"Boomers: still getting lost without a GPS."
I'm guessing what is meant is boomers don't know how to use a GPS. Because gen Z would be the ones getting lost without a device giving them directions, boomers know how to read maps and signs.
(Tbh, the gen z roasts are way funnier than the other reply that she really wanted... but then again, jmho and I maybe bias...)
The gen Z ones hurt more, too. Making them out like really dumb and useless.